Isabelle graduated from Cornell Law School (USA) and has worked for 15 years in the legal world before becoming a full-time author. She speaks four languages fluently, but for a reason that defies her understanding, English is her preferred language for prose. Isabelle lives in Luxembourg and holds the Luxembourgish nationality.

Her picture books, published by Templar (Bonnier Books) and Enchanted Lion Books, have been translated into numerous languages. Her latest, Henri and the Machine, was nominated for the Klaus Flugge Prize 2024 and, like Leo and the Octopus, is currently in development as an animated feature.

Her debut middle-grade novel, Boy Underground (Sweet Cherry Publishing, 2022), shortlisted for the Edward Stanford Award 2024, and the Prix Servais and is in development for film/TV. Its sequel, Boy Overboard, was published in 2025.

Isabelle is a state-certified fitness coach, freediver, runner and weight lifter.